A264668 - OEIS

A264668

a(n) = A264600(n) - A061486(n).

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 18, 27, 36, 45, 54, 63, 72, 81, 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 0, 7, 14, 21, 28, 35, 42, 49, 56, 63

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OFFSET

0,102

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..20000

MAPLE

with(combinat):

f:= n-> (l-> add(mul(l[i], i=w), w=choose(

nops(l)))-1)(convert(n, base, 10)):

g:= proc(n) option remember; `if`(n=0, 0,

irem(n, 10, 'r')*(r+1)+g(r))

end: